Melengestrol acetate

Melengestrol acetate
Clinical data

ATC code	None
Identifiers
IUPAC name [(8R,9S,10R,13S,14S,17R)-17-Acetyl-6,10,13-trimethyl-16-methylidene-3-oxo-1,2,8,9,11,12,14,15-octahydrocyclopenta[a]phenanthren-17-yl] acetate
Synonyms	17α-Acetoxy-16-methylene-6-methyl-6-dehydroprogesterone; 17α-Acetoxy-16-methylene-6-methylpregna-4,6-diene-3,20-dione
CAS Number	2919-66-6
PubChem CID	250948
ChemSpider	219803
KEGG	D04900
ECHA InfoCard	100.018.964
Chemical and physical data
Formula	C₂₅H₃₂O₄
Molar mass	396.519 g/mol
3D model (JSmol)	Interactive image
SMILES O=C4\C=C3\C(=C/[C@@H]1[C@H](CC[C@@]2([C@](OC(=O)C)(C(=C)\C[C@@H]12)C(=O)C)C)[C@@]3(C)CC4)C
InChI InChI=1S/C25H32O4/c1-14-11-19-20(23(5)9-7-18(28)13-21(14)23)8-10-24(6)22(19)12-15(2)25(24,16(3)26)29-17(4)27/h11,13,19-20,22H,2,7-10,12H2,1,3-6H3/t19-,20+,22+,23-,24+,25+/m1/s1 Key:UDKABVSQKJNZBH-DWNQPYOZSA-N

Melengestrol acetate (INN, USAN), also known as 17α-acetoxy-16-methylene-6-methyl-6-dehydroprogesterone, is a steroidal progestin of the 17α-hydroxyprogesterone group that is used in veterinary medicine. It is not approved for use in humans, and is instead used as an implantable contraceptive for captive animals in zoos and other refuges, and is also used as a feed additive to promote growth in cattle, a purpose it is licensed for in the United States and Canada. It is an acetate ester of melengestrol, which in contrast, is not used in either animals or humans.